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WorksheetsModule 5 - Lesson 4 - Mastery check (must do)
Total questions: 15
Worksheet time: 30mins
What is the mole?
A measurement of how many atoms are in a substance
A cute furry creature that burrows in the ground
A way of counting particles in groups of 6 x 10²³ atoms/molecules
A way of weighing out atoms
what is the Avogadro constant?
The idea proposed by Mr Avogadro that atoms were really small
The Idea proposed by Mr Avogadro that if you have the same volume of any gas at RTP you will have the same number of particles
Nobody cares about Mr Avogadro because he was a physicist!
The idea proposed by Mr Avogadro that the same volume of any substance will contain equal numbers of particles
What has more atoms, A mole of Oxygen or a mole of Carbon?
A mole of Oxygen
A Mole of Carbon
They both have exactly the same amount
what is the mass of 1 mole of Lithium?
7g
14g
3g
12g
What is the mass of 0.1 moles Sodium Bromide (NaBr)?
100.3g
10.3g
4.6g
103g
What is the mass of 0.4 moles of hydrated copper (II) sulfate crystals (CUSO₄.5H₂O)
74.4g
1.0g
100g
28.4g
How many moles are there in a 100g sample of magnesium sulfate (MgSO4)?
0.833 moles
1.2 moles
1.66 moles
0.564 moles
How many moles are there is a 50g sample of Calcium Iodide (CaI₂)
(a)
If I asked you to bring me 3 moles of sulfur how much would you need to weigh out? - don't forget your units
(a)
How many moles are there in 60g of Sodium Hydroxide?
(a)
What is the mass of 0.5 moles of Copper (II) Sulfate crystals?
(a)
How many molecules are in a 72 ml sample of water? (remember that 1ml weighs 1g)
2.4
2.4 x 10-24
24 x 1024
2.4 x 1024
which of these statements is NOT true?
Atoms cannot be weighed out individually so we need a way of measuring them in very large numbers
One mole of any substance has a mass that is equal to its relative formula mass in grams
One mole of any substance contains 6.02 x 10²³ particles
One mole of water and one mole of Hydrogen gas contains the same number of atoms
I have a 30g sample of silicon (IV) oxide (SiO2) on my lab bench. How many moles does it contain?
(a)
Phill Mcconical has forgotten to label his sample bottle again! He can remember that it contains 2 moles of a substance, but he can't recall its name. The white powder weighs 200g. What is the sample?
Copper Chloride
Calcium silicate
Copper Oxide
Calcium Carbonate
